ETL 1110-3-456
16 Aug 94
concealment. Base site plans are used to locate local orienta-
tion features, critical assets, and candidate facility sites.
Aerial photographs will give the view that an attack aircraft
might have of a base and are essential to proper planning and
design. Photographs should overlap at least 60 percent and
include oblique photographs taken along likely attack directions
and angles. Aerial imagery in the visual spectra and all infra-
red and radar spectra stated in the design threat are recommend-
ed.
b. Identification of Attack Orientation Features. The base
and surrounding topography should be examined to determine which
existing reference points an attack aircraft might use to locate
the target. Orientation features include highways, railroad
tracks, road intersections, rivers, characteristic landforms such
as knolls, and isolated structures such as towers, poles, and
bridges.
c. Critical Asset Identification. Critical asset identifi-
cation is required when dispersal is to be considered. Critical
assets are base assets that contribute to base war-fighting
capabilities. Each critical asset location should be color
marked on the base site plan. If possible, critical assets
should be categorized according to target value with different
colors assigned to each target category. A comprehensive list of
critical assets that reflects the base wartime configuration
should be obtained when possible. Airbase critical assets will
normally include control centers, communication facilities,
squadron operation facilities, aircraft engine repair shops,
avionics shops, precision measurement equipment laboratory or
PMEL facilities, aircraft hangars, aircraft shelters, open air-
craft parking areas, runways, control towers, jet fuel storage
and dispensing facilities, munitions storage areas, electrical
switching stations, fire stations, ground radar systems, and
ground-to-air weapon systems.
d. Site Visits. A site visit is required to validate attack
orientation features and critical assets and to evaluate the
project site.
e. Coordination With Add-On CCD Measures. The add-on CCD
measures to be deployed during wartime should be thoroughly
investigated to ensure that permanent measures effectively
complement add-on measures. The requirements for permanent
measures may be as simple as providing roof attachments for rapid
deployment of nets or masking thermal infrared signatures to
complement nets that are only effective against visual and radar
viewing.
A-8
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